SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '76948d26750f6e498a60f44eb9844828c163665fa1f703c5a36b0d74ae3f7dd5' 
  AND token = 'qjmaaMVuQjWUW7we/S9YgOPmRtOxjCb4fG/UQuz6ONY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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