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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fa01d7207c58e6c6d26351214c42435e0269b1573a92fa1422402321abf10bd5' 
  AND token = 'VvWpc0S+2aRzybzlad+kzNaKQ4eWNbxNl2dHG4IUIss=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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