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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a7a8f2d54ef0dbbea9ac42ed21c66cc93d699c9f5ae89268495b3ea785001ebc' 
  AND token = 'NDPDLmN0CjqfeTuWKy274liMQLJ7Bdv1eMJ2oigO0TA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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