Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a9381565b5ddbe18d386dd76ac8fc54725dcdea7357111b0a7f8a70546706d50' 
  AND token = '8nngoSnDYWQUoDKPoBauONPbGXz7Pe1y9aQ7E4KhTro=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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