Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bef0b90a97599249e9ef56d652692345448b651d8406633dc1205ed0d683d3e9' 
  AND token = 'cqGcCTtkxYLZjdFcW7ektMRI3yiTb3n5QznL8OlEcvc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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