SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6abafb3b3208f72900a3bac9c5661fb8584bc203349fc53ea6e18d575b824978' 
  AND token = 'wdfFtKKNLy7eLCl//9s5EQG1sCJZzQZ7VpLUXK34Jlw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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