Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e0f3255537e753673698691b2bb5cf9b8f829477ce3c5fffb1293cd096fa64e5' 
  AND token = '1i6PO2te3D6N6z/UPZLArNXcELSOTUKLVz/mL8IXS2o=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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