Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '68d72593cf70f465f6b72378659b8b9caf91a0bef39f0136068b19ecc5ffbc21' 
  AND token = 'u9HWdIln/gEohm++NCweb7aCaLhEQ9COOI3m3egAjww=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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