Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8b9fa988edb52c864f2ec201fb5283150cc2b8815819e75029c403ddb9130ecc' 
  AND token = 'MUx6B6jmFKUqoOFtHZmmeoDPWTUZZG2TAi4HiJ/+26Y=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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