Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1f43de35c5d6b62731a94bdd9d3802141ca819e37f24a41ea8737cda32f74f5d' 
  AND token = 'QQV6JaxLdJsbOHWDmZ0VGLXDl+8fmq4kc40h1aKc9es=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}