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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2da6984483cbba5f7be2c4766a8469909c6b00c9dc3d754635b779d9ffca3b67' 
  AND token = 'Eo6OzqnkgDmRr1FSm83DLiPBAnHEkb4TTMe37GqDHCk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00048

JSON explain

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