Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b72ed98c5fb4561eebeb276fc7e5886f39c69349ccc4443f1e46b50198ad24ad' 
  AND token = 'flaQILHOOKvOxjKBpMoP92LPm486GEyTjCnxf7AQ2h8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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