Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '4cb4311b433a0a07902dfe3aaac64eba764cd8be6fc7afeb5b77960cf0d5a4a2' 
  AND token = 'P4WVHOJ5xwmd5ZA/zQarCvcAiDUEPa6v2W2BGdhyZFs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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