Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3208be16010d1331108ac917a1905878382bf8ddd298fa603d69bec81bfc85f2' 
  AND token = 'qPaM4JgOhvS7t203IuMWulap7YMgPWv4Hg8djw5k+hQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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