Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '213aecf3a0db3b9c871632021cfc253e3d84e0cc9ab73b44a5c97bb1fec36603' 
  AND token = '5owuAu6erKTywW28rzvfJioNkvxlT+sDm6na5Q3Kr0c=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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