Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bc659747bb5069a31e50a631c6fa33bce669263e7623c1e43302ce4ff4a95ff8' 
  AND token = 'PhlySNZXi+c71G2Luj0dcyNl+Eh5/hm/OmttOv+HEhQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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