Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e1d30b8dc089247f6ee45cbf733f521db8ecd3954f88e87ded255ef25e1f0139' 
  AND token = 'J4yCAzcFoDAPbYEOYxvCnLh5Va92mdOwMzRbl+Uq7A8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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