Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '771a2528b9be60165dbc1016940bd759333c6127905bb1f6174fa2238c467282' 
  AND token = 'RDCitxJj3XkF3xkRRyA5F05UXY86fH1cfG3SSY3ki6Y=' 
  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"
    }
  }
}