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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ffb222ec1abc56932fcff20983277ae9a1f874efcff8167e7631e96f3b843989' 
  AND token = 'HrLI3PTzrXJB4nd8qJu3IroJcxwV6C59ePbRX6KHnYk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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