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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '17ec7c0f5bb770babbe96feb73dde0abbdb72ca500fef5e528ca597f33c3d7b3' 
  AND token = 'RbFf1jaRUI9EPq5fnJZh4F8jJSNA74NswbFD8MfmeiU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00014

JSON explain

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