Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ed0b4b59afafe3f5fd0574f840446dec51f1c8a64bb9df9de822bf2ad5e8800c' 
  AND token = 'fX87M6XMD9aVonDthnP0e/FzJYMo4sN3sApoWcNuBwk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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