Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4402d60295c428fb9f935b1ed7585ed081bb28cfbd04e20ee701e0bb96b22a29' 
  AND token = 'nhIi2zwqHDkeY0gABxbsV5WgqqPtwtfp2lspRk1QNw0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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