Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '8b8a7a9fb47355e86dda6e1287570a2fd506b2a0c5aee6e9287184ce6be4904a' 
  AND token = '7urIhk8yu6bq+ChioffpC0LK4v5zvonSd39UpxI9ZWE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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