Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7876cf5c0b3b527c6e57b60f132623890dc9367daac7274ad906d8956bcb05d7' 
  AND token = 'ou35BIwBNnK8siDRpUgTILZmGYm+rONbu7QeyaYu9Mw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00013

JSON explain

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