Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4c594affa70275121f38eed4a1dec35269b62beed8fccb3c96831e4e822e5223' 
  AND token = 'vzC+7x6YTdftFYNO7Ue2sv4APyhFyCvZIghaWGlOm1k=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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