Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f91bd94f18d18e3346a0cf622b4110b8fe247bd01da2d2e7d29bb7039cb24813' 
  AND token = 'AVUE7HW/7oF0FcOQ3qccMzmGjhhW5fdpHchAWfl7504=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00015

JSON explain

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