Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '9f7cba3f71530d7f14bbcbcb9e661451ff0cd555191f2420f9caf053f4e3aac4' 
  AND token = 'bA8SnsMD7Clykae+BChK70attFs/2jLayzHJCR+yAdA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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