Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '97341f61e8d82bb1f9b82b59d2e1f43650aeba0e84f6e65f3d376eeab9d8f984' 
  AND token = 'kxNmoVLdQmEw5TzwFOh1VLUqVDgzIYrfmCe4/bCdzq4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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