Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'a6e87b51127f975109f6030f063a1101fa03b3aaf7b3b4bb2eb8867e43a9e1f1' 
  AND token = '3e1dzACrYFyLXSO4nUgLmkM2M1vDTa9W1sAigIM9zWU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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