Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9ada5b17050aaeed9323663bf9eff84b260a7a7e925b16698a0213db860244f9' 
  AND token = 'JEo/BUdRiktLENv05QK8oqgm0m6sN2T2Y23e31xbrjY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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