Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5e681e1f6bb323a7d6e6123e527d77befbc8d8d10fdaf0fb06a5742997bc1130' 
  AND token = 'zobbhr1sCPpGZbI4WMzj5+yXiOwAkEFzEMv1NHT9WTI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

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