Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7405475bfb0036d4c24b5a161f009c984fd71d48df99086a6c21612c6e617fbc' 
  AND token = '+39atvMyeHwVKo+vKRfKTkl3fxL0MocrVANEitQEjA4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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