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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1e1bcec0be132a22116e6255fb60b32df80d5a3d8f6461f5f12cd9113ecfbc59' 
  AND token = 'Ylyz2HmhHd3jbR5JskQuu7INdEgB66ayquE3lJBa8g8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00081

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}