Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'dbf3b400314abd96158739adddd6f1c5a983cb9791bbc9ea43bf6a013c6ed8d0' 
  AND token = 'gIM7+B8tV4A/tmhjMw70bk3ep7JKpLDZGObuXM6GfkA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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