Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f5d95a8338175931da29a688059f157ed2a643f655212b8d341f125ab478e9b2' 
  AND token = 'W6sqiFnCfmUcAFKCuHcGLKCz4aFt3Rf5j7Ms9uwNrzA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

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