Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '94e7a257a7d186f616516831872602f1ce0c6cc6589ebb62f44147b48d8f37e4' 
  AND token = 'anwvgewvTKelpor+5oBsVI7X0sV2q2IyEAeqkm/9XeE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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