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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '03b66e81350f63879a9eecfc4b515ad16825207ac5b01c7999041b56293dd184' 
  AND token = 'Yphbx74dak0WVjMUNtKFQfGQkZTpr/LSXv2F666Y5zM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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