Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f26bae96397d27fd43700fc84b73d9cdbb85abb4847479d61daee5b120716c12' 
  AND token = 't9FJ087UfqWJesnIOIxz4XDr9tCPpZk+rNnTCMdqQL4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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