Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '91a58a3a058af688de7b3ccabddc6620e517d47851c4345f5d1932683e9d33f6' 
  AND token = 'ykcLQ1/IULl4hYO8xHKDjRolR6nOdqpOXs27LdngErE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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