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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e9e45e1a41f8741192389a943ba22057fb0fe6572b3bad2ec59f75ff6ef62f88' 
  AND token = 'JBYh5QazqOGSA3lBep8LJQDO8TSZxp1+fyxTpofP8CE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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