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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0bfa91f259915f59069970f3a65998f926317334184357d71ce23dd5b6c43c4d' 
  AND token = 'qWkU3V13swkiJ5S3qncjLrat9wg4hwvkJS/gnNuFBaU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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