Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '11c75460081b28e5f8ca200762edab11109c502c67c7555305c9473574e6b667' 
  AND token = 'x1K2n4X7II/HwYI24ql50C5wFSedaaTo0iCDNES6xQY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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