SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '7a8ccd3994a2ce9ee2071c0115ddb654fe8746fa84c99d21c15f85b77f355d54' 
  AND token = 'fYhEPnnAizkU9uXu6/vS1oN8iJc4BblIWsR+QPCvPp0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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