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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a1690afa7f170d03f31c4cb7b6ab8c3d57b60ca3d4fb53d6c0c87754ab48829c' 
  AND token = 'AtssYyhcT0mJcUSZqUvsNGBylT3qTnWL8YefdS6lHrU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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