Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0024a6c64f9cd85fa1d4dfdbdd2c2d5bf21119b99f48d4f84cb7bd466bf929bd' 
  AND token = 'WXT0i+vSHVj76QLg58GpAIUOX+mgI1R3jrs5tWDv77s=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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