Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '29f9d5c32931207c5e1dc7a975826f93022bec3509859f5bd255db851dd0a45c' 
  AND token = 'QvcExX5omRkRP+65DQ5lyD13bz+pp8JFCuz9ctQwLzo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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