Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '92ac3c76279cca88a1ddaa8dcddff3bde58f48ad2f4d1952c5968f0b34ce085c' 
  AND token = '6fai2xo/onne2zDUy+gvU+VNrWdJc2OyYh2w1xMw0Bw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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