SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '22cac485ab73c1c186e95fa94178c884150a0d07b66245952e22820760d5b15b' 
  AND token = 'rcqpD7dYzHkY9jkzJmcQS+ZCH/KqPVILkksTj/VJNsY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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