Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a49184111ef33156e44b6241e612d72360632e6ecf93a28aa2142583c5c367b6' 
  AND token = '7pdvKSPWo2mzMH/x7STO3k6bIJ/8p1hZuqOQeRETwh8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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