Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd9c786657da5f6e7bf5f257a36cb401b66cf808827bbf5ca16aaee71bbd46eff' 
  AND token = 'h7AMoFWhK/NTriuUd0PirJAEsRliMKGpgQTHGPj9HpY=' 
  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"
    }
  }
}