Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f9a70557b9ce2ef9676b02989d55df69dcabc72740bb66012c629b34690edf5e' 
  AND token = 'PBFL/4TSJ+4ciYTOdKItBFc27YU2L2DyHQJpW0eNXnU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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