Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bea1aefe870313758df2638382e24562e728d5547952ad1efe82f384a73c5f66' 
  AND token = 'AX83B0JytPHHcowUkFozCSAocwF7XEXjNENew4+1xKQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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