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SELECT 
  1 
FROM 
  cscart_multi_declock_keys 
WHERE 
  key_id = 'fba03d68d050bc00fd9d2b20ab0bd3d52cff49eed6b59223561ba50f563f0bf8' 
  AND token = 'jW1zS5uUyVQNWlr2UZnbEKpOdRs7e02IgCMv9vkB6YE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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