Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '849461976bf20b13feb6d9d0ef1764e0d21bb689a028a52a2e86e2353d188bd8' 
  AND token = '2cQc1iZ7kwUtEods6h2fAzGCZcWXJU5PPHTGBcaX/ow=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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