Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '40b9c8903e30ea5f6befbe86b2b284df74483d8f1fab4c3c9409176c91b476d9' 
  AND token = 'wd+Rgy7ymxb0ZWTadikm2Y95oybb9+MUQz4C3J5UYmY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00051

JSON explain

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