Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'c09303582fecfa8c2ebff4f7ffe574f7a017bc384dc6b6d3ca19438c5f5c1ccb' 
  AND token = 'Ft4EOQ2W9HilqFc/lfx+ct8mBNxfWpVXL6wVcxvghww=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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