Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f1111b616a49c14824a4829e57e912ecb367967e79952f0791b5c7e6725db8ed' 
  AND token = 'yPLb458uSVW0NX247+DBnPw03BRz8pgBjk7t7UHNmhA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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