Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'dbf916c0b12008f43a014c906b6200ee1664faf18bc9b21499fe1e2e22a0359a' 
  AND token = 'EtpNvTZ6/TaI0u3p/HXXUblQDQ0DO+CYsqH6oK2F2kE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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