Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9e7719346ea76bdfef29be7ae3b56bd75ae743ae67c1e493dbad2467797c4ffd' 
  AND token = 'RA5bx8TUxGmKSCa8XyHHKWpOMjYgRJ7FPJWdHm414RY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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