SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0b73223dbdcf1fc057a9395155b2b6be83d6a7deec2689d91edd2c2bd52f9890' 
  AND token = '22qgjhSXf5tkzmTpjBm7edmi4QZT4/KR0+VgXvyh6RU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00048

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}