Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a1faf194f3b71ba814122d631a55892a995356eef6e8400f1087406410b79ff8' 
  AND token = '7gsbgmFPZjipbJ6RKk8sFDCOA4Xj9e2rLA1DzibBS6I=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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