Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '91b810ae7dcf08d9cacd59fe821f653e346470c87de234b39400c80bc5e04f68' 
  AND token = 'w80UT0X5kNgW5COQPvXdkYdqelgizAsZUmlBz23LYTo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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