Sandbox

SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = '68f8f6f92f47b3fdce32adfb47eb96bc148074d35d565d515bb8f3a9ead36d30' 
  AND token = 'eTObSgOW1+vL7OOB/MRgdH+dEjeXe7P00KdLYEOwqIw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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