Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '54a67683960c73b926550d90686f876caad721483432daf5607d4f1a79336cbd' 
  AND token = 'nj1sxaBj5QzoHcfNyVooVb8yB2lnjjexB1ynBGE0UWk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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