Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5b9c43aced7874b82bb1066c72c991a648c62b4b4ad72ede213b8009faf109a9' 
  AND token = 'HFu2QOQfXXR/ZgPkXAqS2ZYV5D6cUghegGAX0IVLf3M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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