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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'adc34c1ca860dc1df6bf3ab862a90c7ebe31ea1097dd4fa4b21b7757be11b3b4' 
  AND token = 'eua24uLCLuxn96XZk/8SsoYYZQnqEvwC7Iutk9SJakQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00069

JSON explain

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